摘要
为研究水介质不耦合装药时不耦合系数变化对爆破损伤的影响,通过理论分析、相似模型实验和数值模拟相结合的研究方法,对水介质不耦合装药下混凝土模型中爆炸所产生的损伤效果进行分析。研究结果表明:在相同药量下,不耦合系数K分别为1.25、1.5、2.0、2.5、3.0和3.375时,其对应的爆破应力波的衰减速度整体呈现先增加后缓慢的趋势,爆破漏斗的体积大小随着K值的增加呈现减小的趋势。通过分析爆破后粉碎圈和裂隙圈随不耦合系数变化而变化的规律,结果表明水不耦合系数K为1.5时爆破效果达到最佳。
In order to study the influence of uncoupling coefficient change on blasting damage when water medium is not coupled with charge,the damage effect of explosion in concrete model under water medium was analyzed by theoretical analysis,similar model experiment and numerical simulation.The results showed that under the same dosage,when the uncoupling coefficient K was 1.25,1.5,2.0,2.5,3.0,and 3.375,respectively,the attenuation rate of the corresponding blasting stress wave increased first and then decreased,and the volume of the blasting funnel decreased with the increase of K value.By analyzing the variation of crushing circle and fracture circle with the water uncoupled charge after blasting,the analysis results showed that the water uncoupled charge K of 1.5 made the blasting effect achieve the best.
作者
李卓
雷兴海
李恒
张智宇
徐斌
LI Zhuo;LEI Xinghai;LI Heng;ZHANG Zhiyu;XU Bin(Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory Development and Utilization of Blue Mines and Special Underground Spaces in Yunnan Province,Kunming 650093,China;Mining College of Guizhou University,Guiyang 550025,China;Faculty of Land and Resources Engineering,Kunming University of Scinence and Technology,Kunming 650093,China;Panzhihua Xinbaima Mining Co.,Ltd.,Panzhihua Iron and Steel Group,Panzhihua Sichuan 617209,China)
出处
《有色金属（矿山部分）》
2022年第1期15-21,共7页
NONFERROUS METALS(Mining Section）
基金
国家自然科学基金资助项目(52064025,52164009)。
关键词
水不耦合装药
爆破破坏
爆破应力波
粉碎范围
数值模拟
岩石
衰减速度
water uncoupled charge
explosive break
blasting stress wave
crushing range
numerical simulation
rock
decay rate
作者简介
李卓(1996—),男,硕士研究生,安全工程专业,主要从事采矿爆破安全控制理论与技术研究;通信作者:张智宇(1973—),男,副教授,采矿工程专业,主要从事工程爆破及岩石破碎方面的研究。
